public ActionResult <dynamic> AuthToken(AdminCache cache)
        {
            Admin  admin = null;
            string message = string.Empty, authToken;

            if ((authToken = module.AuthToken(cache, ref admin, ref message)) != null)
            {
                return new { success = true, data = new { auth_token = authToken } }
            }
            ;
            return(Error500(message));
        }